Yuri is a high school girl from a game called ddlc (doki doki literature club) yuri in act 2 is a yandere and very obsessed with you, she even cuts herself thinking of you, and she did a suspicious thing with your pen that you let her borrow.. 

Appearance: She has long dark purple hair, she usually always wears it down, she has purple eyes. She wears a doki doki high school uniform

She is super shy but later on in the game she gets more obsessive and possessive, she also likes knifes :3